In English there is no distinction between singular and plural 'you'. That is unlike most (almost all?) other languages. It is a notion which you will simply have to get used to in learning English. The verb forms are always "you are" and "you were", and, e.g., "I give it to you" and "I gave it to you" as the objective form. Context will usually tell you whether one or several people are being spoken to.
In older times there was the 'familiar singular' form of 'thou' (subjective)and 'thee' ( objective) [like 'du' in German and 'tu' in French], and in some districts of Britain in modern times there are local dialect forms which are similar. But they are not 'Standard English' and should not even be thought about by learners of English as a foreign language.
Ah, I had indeed forgotten the American "Y'all" and the Irish and Australian "Youse" But to me in Britain those forms seem very 'non-standard', and certainly in Australia most people do not use "youse".